Hi everyone so I need help, I’m not sure what to do with this so can someone please help me??? Like what am i supposed to do…

9/10

Step-by-step explanation:

To solve the equation, you want x to be alone on one side of the equal sign. To get a term from one side to another, you perform the reverse operation of it on both sides. In this equation, X - 1/2 = 2/5, we need to move -1/2 to the other side to get x alone. So do the reverse operation (adding 1/2).

X - 1/2 + 1/2 = 2/5 + 1/2

-1/2 + 1/2 is 0, so they cancel each other out and x is left alone on one side. the other side is 2/5 + 1/2. Find a common denominator (10 works) and then do 4/10 + 5/10. You get 9/10 as X

So basically:

X - 1/2 = 2/5

Add 1/2 to both sides

X = 2/5 + 1/2

Find a common denominator

X = 4/10 + 5/10

Simplify

X = 9/10

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13